61 lines
1.6 KiB
NASM
61 lines
1.6 KiB
NASM
dnl PowerPC-64 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
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dnl the result from a second limb vector.
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dnl Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
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dnl This file is part of the GNU MP Library.
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dnl The GNU MP Library is free software; you can redistribute it and/or modify
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dnl it under the terms of the GNU Lesser General Public License as published
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dnl by the Free Software Foundation; either version 2.1 of the License, or (at
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dnl your option) any later version.
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dnl The GNU MP Library is distributed in the hope that it will be useful, but
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dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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dnl License for more details.
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dnl You should have received a copy of the GNU Lesser General Public License
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dnl along with the GNU MP Library; see the file COPYING.LIB. If not, write
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dnl to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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dnl Boston, MA 02110-1301, USA.
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include(`../config.m4')
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C cycles/limb
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C POWER3/PPC630: 6-18
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C POWER4/PPC970: 10
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C INPUT PARAMETERS
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C res_ptr r3
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C s1_ptr r4
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C size r5
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C s2_limb r6
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C cy_limb r7
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ASM_START()
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PROLOGUE(mpn_submul_1)
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li r7,0 C cy_limb = 0
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PROLOGUE(mpn_submul_1c)
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mtctr r5
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addic r0,r0,0
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addi r3, r3, -8
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addi r4, r4, -8
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L(top): ldu r0,8(r4)
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ld r10,8(r3)
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mulld r9,r0,r6
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adde r9,r9,r7
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mulhdu r7,r0,r6
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addze r7,r7
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subfc r9,r9,r10
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stdu r9,8(r3)
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subfe r11,r11,r11 C invert ...
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addic r11,r11,1 C ... carry
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bdnz L(top)
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addze r3,r7
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blr
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EPILOGUE(mpn_submul_1)
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EPILOGUE(mpn_submul_1c)
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